"\u03B3-lactone" . "lactone" . . "lactonizes" . . . "cyclic ester" . "\u03B3 isomer" . "lactonization" . . "\u03B2-propiolactone" . "macrolactonization" . . "lactonizable" . . . "beta-lactones" . . "macrolactone" . "lactonic" . "''\u03B2''-lactone" . "Lactonization" . . . . "Lactone" . . "Lactone#macrolactone" . . "delta-lactone" . "lactones" . "gamma-undecalactone" . "Lactone" . "dilactone" . "lactonizing" . "reactions" . "lactone ring" . "preparation" . "ring-closing lactonization" .